[单选题]
Which of the following polyatomic ions formulas is incorrect?
A. $N{O_3}^-$
B. $OH^-$
C. ${SO_4}^{2-}$
D. $C{O_4}^{2-}$
参考答案: D
本题详细解析: There is no polyatomic ion with the formula of $C{O_4}^{2-}$.The correct formula for the carbonate ion is $C{O_3}^{2-}$. The formulas and charges of the other ions are correct.